If you want to administer IPA from the command line, you need to install IPA
command line tools. This is what it calls as 'administrator machine'.
For a regular client system you wouldn't be running 'ipa' command, thus
installing ipa-admintools is not needed.
I agree it is a bit terse there so it might be a good idea to file a
documentation bug against 'ipa' component of RHEL 7.
--
/ Alexander Bokovoy
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